A scientist is at the hospital visiting a friend's young daughter, who has been
diagnosed with a respiratory virus. On his way out, he speaks with a nurse
and discovers that the pediatric wing of the hospital was recently converted
into a respiratory disease unit due to the recent rise in respiratory infection.
The scientist realizes that respiratory disease is a serious problem. The
scientist is in which part of the engineering process?
A. Making a plan
B. Doing the plan
C. Knowing the background
D. Identifying a need

Is laundry detergent an acid or a base?

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

How do dying stars contribute to the formation of planets